Upon starting the car I get about 3-5 seconds of hissing from the ac and the 2 vents closest to the passenger side are blowing warmer air. Upon researching a bit I am coming to possible diagnosis of a hose leak that would need to be replaced and to recharge all lines with refrigerant. I am sure this has come before if anybody has to a link to prior thread and problem solved. Is this something I can check myself before bringing it to the shop? Any help is greatly appreciated. Thanks.

Need a specialist shop to inject Freon with uv dye.

How do you run the onboard ac diagnosis to get values and any errors? Have tried all button combinations and nothing is showing.

Check for freon gaz and before you refill you need to check that there is no leak
Worse part is the a/c compressor but start with freon gaz

It does seem like it will eventually leak over the years by intention, I came across a thread with the whitepaper showing it will leak a certain amount in 10 years, this is intentional, I think it was because of something along the lines of protecting and lubricating the seals.

anybody had this problem and it was fized with a recharge of r134a refrigerant? figure that is the first thing to do to see if it fixes the problem.